package com.itheima.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.common.R;
import com.itheima.dto.DishDto;
import com.itheima.entity.Category;
import com.itheima.entity.Dish;
import com.itheima.entity.DishFlavor;
import com.itheima.service.CategoryService;
import com.itheima.service.DishFlavorService;
import com.itheima.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/*
* 菜品管理
* */
@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        Set keys = redisTemplate.keys("dish_*"); //获取所有以dish_xxx开头的key
        redisTemplate.delete(keys); //删除这些key
        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize,String name){

        //构造分页构造器对象
        Page<Dish> pageInfo  = new Page<>(page,pageSize);
        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加条件过滤器
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //分析: 上述查询的分页对象中,List<Dish>数据中,每一个Dish对象,没有分类名称
        //2. 创建新的分页对象
        Page<DishDto> dtoPage  = new Page<>();
        //3. 进行对象拷贝
        // records属性,分页查询的集合数据,数据是需要处理的(没有分类名称),因此我们不拷贝集合数据
        BeanUtils.copyProperties(pageInfo,dtoPage,"records");
        //4. 获取基本分页查询的集合数据
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> dtoList = new ArrayList<>();
        //5. 遍历菜品集合
        records.forEach(dish -> {
            // 5.1 将Dish拷贝到DishDto
            DishDto dto = new DishDto();
            BeanUtils.copyProperties(dish,dto);
            // 5.2 查询被一个菜品所属分类名称
            Category c = categoryService.getById(dish.getCategoryId());
            dto.setCategoryName(c.getName());
            // 5.3 放入集合中
            dtoList.add(dto);
        });
        //6. 将dtoList集合,添加到dtoPage分页对象中
        dtoPage.setRecords(dtoList);

        //7. 返回分页对象数据
        return R.success(dtoPage);
    }

    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto disDto = dishService.getByIdWithFlavor(id);

        return R.success(disDto);
    }


    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        Set keys = redisTemplate.keys("dish_*"); //获取所有以dish_xxx开头的key
        redisTemplate.delete(keys); //删除这些key
        return R.success("修改菜品成功");
    }

//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//        //构造查询条件
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
//        // 添加条件,查询状态为1(起售状态)的菜品
//        queryWrapper.eq(Dish::getStatus,1);
//        // 添加排序条件
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//
//        List<Dish> list = dishService.list(queryWrapper);
//        return R.success(list);
//    }

//    @GetMapping("/list")
//    public R<List<DishDto>> list(Dish dish){
//        //构造查询条件
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
//        // 添加条件,查询状态为1(起售状态)的菜品
//        queryWrapper.eq(Dish::getStatus,1);
//        // 添加排序条件
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//
//        List<Dish> list = dishService.list(queryWrapper);
//
//        List<DishDto> dishDtoList = new ArrayList<>();
//
//        list.forEach(item -> {
//            DishDto dishDto = new DishDto();
//            BeanUtils.copyProperties(item,dishDto);
//
//            Long categoryId = item.getCategoryId(); // 分类id
//            //根据id查询分类对象
//            Category category = categoryService.getById(categoryId);
//            if (category != null){
//                String categoryName = category.getName();
//                dishDto.setCategoryName(categoryName);
//            }
//
//            //当前菜品的id
//            Long dishId = item.getId();
//            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
//            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
//
//            List<DishFlavor> dishFlavors = dishFlavorService.list(lambdaQueryWrapper);
//            dishDto.setFlavors(dishFlavors);
//        });
//
//
//        return R.success(dishDtoList);
//    }


    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){

        List<DishDto> dishDtoList = null;
        //动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();//dish_1397844391040167938_1
        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if(dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }


        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

         dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);

            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }


    @DeleteMapping()
    public R<String> delete(@RequestParam List<Long> ids){

        log.info("根据id删除{}",ids);
        dishService.removeById(ids);

        return R.success("删除成功");
    }

    @PostMapping("/status/{status}")
    public R<String> upDate(@PathVariable Integer status,@RequestParam List<Long> ids){

        log.info("修改的菜品id{},状态码{}",ids,status);

        LambdaUpdateWrapper<Dish> updateWrapper = new LambdaUpdateWrapper<>();
        updateWrapper.in(Dish::getId,ids);
        updateWrapper.set(Dish::getStatus,status);

        dishService.update(updateWrapper);

        return R.success("状态修改成功");
    }
}
